Lock



L. KAsPAHowlcH.

LOCK.

` l APPLICATION FILED SEPT. 25| 1919. v v 1,373,1 34, Patented Mar. 29, 1921.

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IN V EN TOR. Kaspar/Zw.

A TTORNEY.

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LOCK.

APPLICATLUN FILED SEPT. 25, i919.

Pana Mar. 29, 1921.

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A TTURNE Y.

UNITED STATES LEON KASPAROWICH, F ROXBURY, MASSACHUSETTS.

LOCK.

Specification of Letters Patent.

Patented Mar. 29, 1921.

Application filed September 25, 1919. Serial No. 326,200.

To all 'whom t may concern Be it known that I, LEON KAsrARowIon, a citizen of Russia, residing at Roxbury, county of Suffolk, and State of Massachusetts, have invented certain new and useful Improvements in Locks, of which the following is a specification.

This invention relates to improvements in combination locks and the mechanism for operating them. The object of this invention is to provide a strong, sate and durable lock, having a plurality of locking bolts impelled by a system of cams, and a key having a peculiarly divided stem and rotative wards.

This object is attained by the novel construction and combination of parts herein after described and shown in the` accompanying drawings, forming a material part of this disclosure and in which Figure 1 is a top plan view of a lock, with the cover plate removed.

Fig. 2 is a longitudinal sectional view taken along line 22 of Fig. 1.

Fig. 3 is a reversed longitudinal sectional view taken along line 3-3 of Fig. 1.

Fig. 4 is a reversed longitudinal sectional view taken along 9-9 of Fig. 1.

Fig. 5 is a perspective plan view of the retarding plate.

Fig. 6 is a perspective plan view of the upper locking olt.

Fig. 7 is a perspective plan view of lower detent plate cam.

Fig. 8 is a plan view of the key, and

Fig. 9 is a plan view of lock, showing and indicating by dotted lines three distinct positions of the locking bolts.

Referring to the drawings.. in detail, the numeral 10 designates a lock casing, having as integral elements the bosses 11 and 12 and a face plate 13 fixedly secured thereto.

The locking bolt 14 is reduced in thickness and extended in width at its rear or inner portion and is pierced through its rear element by an elongated slot 15, and provided along its u per edge with a series of depressions 16, 17 and 18, designed to engage the detent finger 19 of the cam 20 here inafter described.

The locking bolt 14 has formed upon its lower edge, two deeply cut depressions 21 and 22, of irregular outline designed to be engaged by the lower ward of the key,

shown in Fig. 8, by use of which the bolt 14 may be caused to move in a forward or backward direction, guided by the boss 11 and an oblong opening in the face plate 13.

A detent cam 20 has on its upper extremity a down-turned detent linger 19 and a spring seat 23, and on its lower edge is formed an outline 24 and is adapted to move in a vertical direction guided by the slot 31, contactable with the boss 11 and guide pin 25, a looped dat spring 26, effecting a downward or locked position of the detent cam 20, under normal conditions, and an angular retaining plate 27 held by the shoulder screws 28 securing the elements 14, 2O and 27 in proper position.

Another locking bolt 3() is movably secured and guided by the boss 12 and by a suitable opening in the element 13. Formed upon the offset edge portion of the bolt 30 are depressions 35 and 36 engageable with the upper sectional ward 62 of the key and by which means a forward and backward movement is imparted to the bolt 30. Formed upon the opposite edge of the same element is an irregular outline 37 and 38 combining the function of detent stops and cams engageable with the upturned detent finger 39 of the detent plate cam 40, this cam having a straight edge 41 adapted to be depressed by the key and is pivotally attached to the bridge plate 54 at the point 42 by the `screw 43.

The element 39 is held against the formed edge of bolt 30, by the flat spring 44, secured to the casing by the screw 45.

A latch bolt 46 is movable slidably through the face plate 13 and is operated by thev cam 47 which is rotatably held within the casing 10 by the plate 48, the element 47 being r0- tated by arectangular rod passing slidably through it and to which is attached a door knob of usual design, (not shown).

A coiled compression spring 50, secured at the ends by the studs 51 and 52, is designed to keep the latch 46 in an outward or normal position.

A bridge plate 54 having in its center an irregular shaped aperture 55 designed to receive and guide the key, is substantially secured to the casing by means of the screws 56.

A key element has a hollow annular shank 61 and integral with its lower end is a radial extension or ward 62. Revolubly secured within the shank 60, is a rod 63 having an extension 64 and a ward 65 eontactable with the element 62 and of similar sectional conformation.

A head or bow 66, is securely attached to the rod 63 and rotatable with it. In opera-k tion., a key as shown in Fig. 8, introduced into the lock and rotated in the direction indieated by the arrows, shown in Fig. 9, will, by the action of the ward 62, cause the plate 20 to move upwardly, raising the detent 19 from the seat 16. A fur her movement of the key within the depression 21 imparts a parallel outward movementto the bolt lil which, when the ward of the key has passed, will become locked by the detent 19 dropping into the seat 17, the detent plate 20 being returned to a normal position by the spring 26. A further advancement of the lock bolt 14: may be obtained by a second revolution of the key. y

The lower bolt is actuated in a manner similar to the above description by the key ward 65,` the key being rotated in the reverse direction, the ward 65 depressing the plate 40, which has the detent 39 eontactably held by the spring 40 against the detent seat 37 of the element 30. It being further rotated, a Jforward movement of the bolt is effected and a further advancement may be had by making another revolution of the key.

The key body elements 60 and 66 on being separated, as at 67 in F ig. 8, maybe rotated upon one another and permit the elements 60 and 62 to remain stationary while the elements 65 and 66 may be turned .in either direction.

From the foregoing it will be clear, that the key must be made in two pieces, so that the elements 62 and 65 can be brought into alinement in order to allow the key to be entered into the key-hole and to be withdrawn therefrom, while a turn of the element 66 will swing the element 65 out ot aiinement with the element 62 so that the ke)v cannot be removed from the lock if this is desired.

Having thus described in v invention what I claim as new and desire to secure by Iietters Patent is In a lock, the combination with the hollow casing, and a lair of bolts arranged to slide independently therein, said bolts having their inner portion reduced in thickness and broadened in width each containing elongated slots, rigid guides extending through the mentioned slots, detents engaging the edges of said bolts, a tubular shanked key having a ward engaging one of said detents to release the bolt engaged by said detent, and another ward engaging the other detent to release the second bolt, means on said bolts whereby they are intermittently operable, a, stem rotatable in said shank, and a ward fixed on said stem, said wards being operable in connection with each of said bolts whereby they are actuated intermittently.

In testimony whereol I have ailixed my signature.

LEON KASPAROVVICH. 

